Nice and simple.
For when I can't use my drums for practice (or if I dont want to) my computer desk doubles as my 'practice area'.
I put my copy of Stick Control on the computer (otherwise it would be a pain reading the book on the desk) and for the metronome i use the good ol free online metronome.
Once I get a double pedal I'll be making my own kick practice pad and sticking it under the desk.
So even while browsing the net (or even playing video games) I can work on my double bass.